Turnover device

Abstract

In the technical scheme provided in the application, the turnover table comprises a bottom plate, a first V-shaped limiting structure and a sliding block are arranged on the bottom plate, the first V-shaped limiting structure and the locked sliding block fix the workpiece in the radial direction; a buckle plate is further arranged on the bottom plate, the buckle plate fixes the workpiece in the axial direction; the turnover table further comprises a cantilever, a second V-shaped limiting structure is arranged at the free end of the cantilever; a saddle clamp is connected to the free end of the cantilever at both ends, a top rod arranged on the saddle clamp is radially positioned with the second V-shaped limiting structure and the top to another position of the workpiece. After the workpiece is fixed on the turnover table through the above structure, the turnover table is driven to rotate by a power device, so that the horizontal state and the vertical state of the workpiece are switched back and forth. Compared with the manual auxiliary completion of the workpiece turnover by the cage, the turnover device provided in the application has little human participation, small operation difficulty and high efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of material handling devices, and particularly relates to a turnover device. BACKGROUND

[0002] The main shaft (with a rotatable bearing seat) bearing chamber for a wind driven generator is divided into seven specifications, and there are 14 states with and without bearings, the maximum quality is 55 tons, the length is not equal from 3425mm to 4400mm, the shape is not the same and the gravity center position is not the same. Before the main shaft assembly of the wind power workshop, the main shaft bearing chamber is hoisted to the work station by the crown block, which is in a vertical state. When assembling, the main shaft bearing chamber is turned over by 90 degrees to a horizontal state. This work is completed by the crown block and manual assistance. Since the workpiece quality is very large, the operation is very difficult, the efficiency is low, and there is a certain risk. SUMMARY

[0003] The present application provides a turnover device.

[0004] The turnover device provided in the present application comprises a turnover table for carrying a workpiece, a base for supporting the turnover table, and a power device for driving the turnover table to rotate, characterized in that the turnover table comprises:

[0005] A bottom plate is provided with a first V-shaped limiting structure and a sliding block, the sliding block is movably connected with the bottom plate and can be locked at a certain position on the bottom plate, the first V-shaped limiting structure and the locked sliding block radially fix the workpiece; a linear power output unit is further arranged on the bottom plate, the output end of the linear power output unit is connected with a clamping plate, the fixed end of the linear power output unit is connected with the bottom plate, and the clamping plate axially fixes the workpiece;

[0006] A vertical plate is connected with the bottom plate to form an L shape;

[0007] A cantilever is fixed to the vertical plate, and a second V-shaped limiting structure is arranged at the free end of the cantilever;

[0008] A saddle clamp is connected with the free end of the cantilever at both ends, the semi-annular saddle clamp and the second V-shaped limiting structure form an annular structure, a through hole is arranged on the saddle clamp, a jack passes through the through hole, the jack is movably connected with the through hole and can be locked with the through hole, and the second V-shaped limiting structure and the jack radially position the workpiece.

[0009] In a preferred embodiment, the base is formed by connecting steel sections, reinforcing bars are arranged on both sides of the steel sections, and the base is fixed to the ground by expansion bolts.

[0010] In a preferred embodiment, the base is connected to the turnover table by heavy-duty bearings.

[0011] In a preferred embodiment, the bottom plate and the vertical plate are formed by welding a steel plate on a rectangular profile.

[0012] In a preferred embodiment, the turnover device further comprises:

[0013] The support frame comprises a first section connected to the vertical plate and a second section connected to the first section, and the length of the support frame is changed by changing the length of the connection between the second section and the first section.

[0014] In a preferred embodiment, two grooves are arranged on the bottom plate, the two grooves are arranged in a V shape on the bottom plate, and the end with a smaller distance between the two grooves is closer to the vertical plate than the end with a larger distance.

[0015] The bottom of the groove is provided with a lead screw, the lead screw is provided with a lead screw nut, the slider is connected to the lead screw nut, and the side wall of the slider is in sliding fit with the side wall of the groove.

[0016] In a preferred embodiment, the fixed end of the linear power output unit is in sliding fit with the groove through a connecting block, and the output end of the linear power output unit is rotatable relative to the connecting block.

[0017] In a preferred embodiment, the connecting block is connected to the slider.

[0018] In a preferred embodiment, two through holes are arranged on the saddle clamp, the axes of the two through holes are arranged in a V shape, and the intersection of the axes of the two through holes is located in the annular structure enclosed by the saddle clamp and the second V-shaped limiting structure.

[0019] In a preferred embodiment, the length of the cantilever is changed by adjusting the length of the connection between the free end and the fixed end of the cantilever.

[0020] According to the specific embodiments provided by the present application, compared with the prior art, the present application has the following technical effects:

[0021] The turnover device comprises a turnover table for carrying a workpiece, a base supporting the turnover table, and a power device driving the turnover table to rotate. In the technical scheme provided in the present application, the turnover table comprises a bottom plate, a first V-shaped limiting structure and a sliding block arranged on the bottom plate, the first V-shaped limiting structure and the locked sliding block radially fix the workpiece, a linear power output unit is further arranged on the bottom plate, a buckle plate is connected to the output end of the linear power output unit, the buckle plate axially fixes the workpiece, the turnover table further comprises a cantilever, a second V-shaped limiting structure is arranged at the free end of the cantilever, a saddle clamp is connected to the free end of the cantilever at both ends, the saddle clamp is in a semi-ring shape, and the saddle clamp and the second V-shaped limiting structure enclose an annular structure, a jacking rod arranged on the saddle clamp and the second V-shaped limiting structure radially position another position of the workpiece. After the workpiece is fixed on the turnover table through the above structure, the turnover table is driven by the power device to rotate, so that the horizontal state and the vertical state of the workpiece are switched. The power device can be a hydraulic cylinder, which drives the turnover table to rotate. Compared with the manual auxiliary completion of the workpiece turnover by the crown block, the turnover device provided in the present application has little human participation, low operation difficulty and high efficiency. The fixing scheme of the turnover table for the workpiece comprises radial positioning of the workpiece by the first V-shaped limiting structure and the sliding block, axial fixation of the workpiece by the buckle plate, and radial positioning of another position of the workpiece by the second V-shaped limiting structure and the jacking rod. The structures for positioning are rigidly connected and fixed with the workpiece, and the danger of the technical scheme is reduced compared with the flexible connection state of the crown block for completing the turnover action.

[0022] When the workpiece is hoisted onto the turnover table, the first V-shaped limiting structure on the bottom plate and the workpiece are difficult to completely fit due to the heavy weight of the workpiece. In the present application, the sliding block is movably connected with the bottom plate, and the workpiece is pushed to fit with the first V-shaped limiting structure through the sliding block, thereby reducing the requirement for hoisting operation precision and making the operation simpler. On the other hand, the sliding block is movably connected with the bottom plate, so it can adapt to workpieces of different sizes, thereby increasing the application range of the turnover device and improving the utilization rate of the device.

[0023] Correspondingly, a through hole is arranged on the saddle clamp, the jacking rod passes through the through hole, the jacking rod is movably connected with the through hole and can be locked with the through hole, the second V-shaped limiting structure and the jacking rod radially position the workpiece, so the cantilever can also adapt to workpieces of different sizes, thereby achieving the technical effect of improving the utilization rate of the device. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic view of the turnover device provided in the embodiment of the present application, in which the turnover table is in a vertical state;

[0025] Figure 2 is Figure 1 is a partial enlarged view of part A in figure 1;

[0026] Figure 3 is a schematic view of the overturning device provided by the embodiment of the present application, in which the overturning table is in a horizontal state;

[0027] Figure 4 is a schematic view of the overturning device provided by the embodiment of the present application, in which the overturning table is in a horizontal state from another perspective;

[0028] Figure 5 is a schematic view of the overturning device provided by the embodiment of the present application, in which the overturning table loaded with the main shaft of the wind turbine is in a vertical state;

[0029] Figure 6 is a schematic view of the overturning device provided by the embodiment of the present application, in which the overturning table loaded with the main shaft of the wind turbine is in a horizontal state. DETAILED DESCRIPTION

[0030] The present application will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0031] EMBODIMENT

[0032] During the machining and assembly process of heavy large mechanical structures, the state of the structure needs to be changed, and the method of using a crown block to hoist and manually assist in overturning the structure is low in efficiency and poor in safety. The overturning device provided by the embodiment is intended to provide an overturning device with high efficiency and high safety.

[0033] The overturning device, especially the overturning device suitable for heavy large mechanical structures, occupies a large area and costs a lot, so expanding the application range of the device to improve the utilization rate of the device is also a technical problem to be faced and urgently solved. The overturning device provided by the embodiment, with reference to Figure 5 and Figure 6 , is applied to overturning the main shaft 100 for a wind turbine, needs to face the main shaft with a bearing chamber 200 and without a bearing chamber, the main shaft and the bearing chamber, 7 kinds of specifications, the maximum mass is 55 tons, the length is different from 3425mm to 4400mm, and the shape is different. The overturning device in the embodiment increases various safety systems to ensure the stability and reliability and safety during the vertical and horizontal state overturning operation of the device. And adjustable tooling is designed to adapt to different shapes of workpiece state.

[0034] Specifically, the overturning device comprises an overturning table for carrying a workpiece, a base supporting the overturning table, and a power device driving the overturning table to rotate.

[0035] Referring to Figures 1-4 , the turnover platform comprises a bottom plate 1, a vertical plate 3, a cantilever 4 and a saddle clamp 5.

[0036] Wherein, the first V-shaped limiting structure and the sliding block 104 are arranged on the bottom plate 1, the sliding block 104 is configured to be movably connected with the bottom plate 1 and lockable at a certain position on the bottom plate 1, and the first V-shaped limiting structure and the locked sliding block 104 radially fix the lower end surface of the main shaft (refer to the position in Figure 1 The linear power output unit is further arranged on the bottom plate 1, the output end of the linear power output unit is connected with a buckle plate 105, the buckle plate 105 is connected with the output end of the linear power output unit, and the fixed end of the linear power output unit is connected with the bottom plate 1, so that the buckle plate 105 axially fixes the main shaft.

[0037] In this embodiment, the first V-shaped limiting structure is formed by arranging two mirror-symmetrical bosses 101. Preferably, the boss 101 has two right-angle edges, three segments of fold lines connect the non-right-angle ends of the two right-angle edges, the first segment of fold line away from the vertical plate 3 plays a role of rough positioning when placing the main shaft for wind driven generator, the second segment of fold line in the middle is the hypotenuse of the first V-shaped limiting structure, and the fold line close to the vertical plate 3 leaves a space between the two bosses 101 to avoid interference with the flange plate above the lower end surface of the main shaft.

[0038] Wherein, one side of the vertical plate 3 is connected with one side of the bottom plate 1 to form an L shape.

[0039] Wherein, the cantilever 4 is fixed on the vertical plate 3, and the free end of the cantilever 4 is provided with a second V-shaped limiting structure 401.

[0040] In this embodiment, the second V-shaped limiting structure 401 is formed by arranging two mirror-symmetrical plug blocks 4011.

[0041] Wherein, the two ends of the saddle clamp 5 are connected with the free end of the cantilever 4, the semi-ring-shaped saddle clamp 5 and the second V-shaped limiting structure 401 form an annular structure, a through hole 501 is arranged on the saddle clamp 5, a jacking rod 502 passes through the through hole 501, the jacking rod 502 is configured to be movably connected with the through hole 501 and lockable with the through hole 501, and the second V-shaped limiting structure 401 and the jacking rod 501 radially position the shaft segment between the two bearing seats 200 of the main shaft for wind driven generator.

[0042] In this embodiment, the two ends of the saddle clamp 5 are connected with the cantilever 4 by detachable pin hole connection. The two ends of the saddle clamp 5 are provided with pin holes on the upper and lower surfaces, and the pin 504 is inserted into the pin holes to connect the two. The two ends of the saddle clamp 5 are provided with flaps on the upper and lower surfaces, and the free ends of the cantilever 4 are inserted between the flaps to further position the two longitudinally. Further, the side walls of the two ends of the saddle clamp 5 are provided with male buckles, and the side walls of the two corners of the free ends of the cantilever 4 are provided with female buckles. The male buckle and the female buckle are inserted into each other to position the saddle clamp 5 and the cantilever 4.

[0043] In this embodiment, the outer wall of the jacking rod 502 is provided with external threads, and the inner wall of the through hole 501 is provided with internal threads. The external threads and the internal threads are interlocked. The jacking rod 501 is provided with a rotating handle at one end of the convex side of the saddle beam 5, and is provided with a ball head at the other end of the concave side of the saddle beam 5. Rotating the handle makes the ball head move radially along the main shaft of the wind power generator, and is pressed against the shaft wall of a certain section of the main shaft of the wind power generator. The external threads of the outer wall of the jacking rod 502 and the internal threads of the inner wall of the through hole 501 are interlocked, and cooperate with the second V-shaped limiting structure to position the shaft section between the two bearing seats 200 of the main shaft of the wind power generator radially.

[0044] Before the main shaft of the wind power generator is hoisted onto the turnover device, the saddle clamp 5 is not connected to the cantilever 4. When the main shaft needs to be turned over:

[0045] The main shaft of the wind power generator is hoisted and placed on the bottom plate 1 in a vertical state (i.e. the axis is vertical);

[0046] The saddle clamp 5 is connected to the cantilever 4;

[0047] The slide block 104 is pushed, and the outer wall of one end of the main shaft is attached to the first V-shaped limiting structure;

[0048] The output end of the linear power output unit drives the clamping plate 105 to clamp on the flange plate at the lower end of the main shaft;

[0049] The ball head of the jacking rod 501 is pressed against the part of the shaft of the main shaft.

[0050] After the main shaft is fixed on the turnover platform by the above operations, the turnover platform is driven by the power device to rotate, thereby realizing the switching between the horizontal state (as shown in Figure 6 ) and the vertical state (as shown in Figure 5 ).

[0051] The power device can select a hydraulic cylinder 13, which pushes the turnover table to rotate. In an embodiment, the lower end rear side of the vertical plate and the rear end of the bottom plate 1 are provided with support plates 1102, and two or more pairs of support plates 1102 are arranged. A rotating shaft 1101 is arranged between each pair of support plates 1102. A pair of bearing seats 12 are arranged on the base, and the turnover table is erected on the bearing seats 12 through the shaft and the bearing. The cylinder rod of the hydraulic cylinder 13 is connected with the rotating shaft 1101, and the cylinder rod is extended and retracted to push the turnover table to rotate around the bearing seat 12, so as to realize the turnover of the turnover table.

[0052] Compared with the manual auxiliary completion of the turnover of the workpiece by the crown block, the turnover device provided by the present application has little human involvement, low operation difficulty, and high efficiency. The fixing scheme of the turnover table for the workpiece includes the first V-shaped limiting structure and the sliding block for radially positioning the workpiece, the buckle plate for axially fixing the workpiece, and the second V-shaped limiting structure and the ejector rod for radially positioning another position of the workpiece. The structures for positioning are rigidly connected and fixed with the workpiece. Compared with the flexible connection state of the crown block for completing the turnover action, the technical scheme of the present application reduces the danger.

[0053] When the workpiece is hoisted onto the turnover table, it is difficult for the workpiece to completely fit between the first V-shaped limiting structure on the bottom plate due to the heavy weight of the workpiece. In the present application, the sliding block is configured to be movably connected with the bottom plate, and the sliding block is used to push the workpiece to fit with the first V-shaped limiting structure, thereby reducing the requirement for hoisting operation precision and making the operation simpler. On the other hand, the sliding block is configured to be movably connected with the bottom plate, so it can adapt to workpieces of different sizes, thereby increasing the application range of the turnover device and improving the utilization rate of the device.

[0054] Correspondingly, the saddle-shaped clamp is provided with a through hole, and the ejector rod passes through the through hole. The ejector rod is configured to be movably connected with the through hole and can be locked with the through hole. The second V-shaped limiting structure and the ejector rod radially position the workpiece, so the cantilever can also adapt to workpieces of different sizes, thereby achieving the technical effect of improving the utilization rate of the device.

[0055] In a preferred embodiment, the base is formed by connecting HM500X300 type steel 201, and reinforcing bars 202 are arranged on both sides of the HM500X300 type steel 201. The base is fixed to the ground by expansion bolts. The HM500X300 type steel 201 is used as a bottom frame, and a large area of the bottom frame is in contact with the ground to meet the ground stability of the device. The reinforcing bars 202 are arranged on both sides of the HM500X300 type steel 201 to ensure the rigidity of the base. The expansion bolts are used to fix the base to the ground to ensure the stability of the device during the turnover process.

[0056] In a preferred embodiment, the base and the turnover table are connected by a 23040 heavy-duty bearing. The 23040 heavy-duty bearing meets the turnover action bearing force and reliability, the rated dynamic load, the rated static load and the radial load meet the use requirements, the use requirement reliability reaches 90%, and the stress and turnover stability during large tonnage operation rotation are fully met.

[0057] In a preferred embodiment, the steel plate is welded on a 200x400 rectangular profile to form the bottom plate and the vertical plate, wherein the thickness of the steel plate used by the bottom plate is 25mm. The rectangular profile is integrally welded with the steel plate to become an integral guarantee of rigidity.

[0058] In order to prevent the bearing seat on the main shaft from rotating, the turnover device provided in the embodiment further comprises:

[0059] The support frame comprises a first section 801 connected to the vertical plate 3 and a second section 802 connected to the first section 801. The length of the support frame can be changed by changing the connection length of the second section 802 and the first section 801, so that the second end 802 can support the bearing seat 200 on the main shaft 100 when the main shaft is turned over. The connection length of the second section 802 and the first section 801 is adjusted to be suitable for bearing seats of various sizes. Preferably, the support frame is provided with a pair, which supports both ends of one bearing seat. Further, as Figure 5 The support frame can be provided with two pairs on the turnover device loaded with the main shaft, which supports both bearing seats on the main shaft.

[0060] In the above embodiment, by providing the cantilever 4 with an end portion 403 and a root portion 402, the length of the cantilever 4 is adjusted by changing the connection length between the end portion 403 and the root portion 402, which is suitable for bearing seats of more sizes.

[0061] In the embodiment, the bottom plate 1 is provided with an opening 102 for avoiding the lifting tool on the main shaft.

[0062] For the specific embodiment that the sliding block is movably connected to the bottom plate and can be locked at a certain position on the bottom plate, in the embodiment, two grooves are provided on the bottom plate 1, the two grooves are arranged in a V shape on the bottom plate 1, and the smaller distance end of the two grooves is closer to the vertical plate 3 than the larger distance end.

[0063] The groove bottom is provided with a lead screw 103, the lead screw 103 is provided with a lead screw nut, the sliding block 104 is connected to the lead screw nut, and the side wall of the sliding block 104 is in sliding fit with the side wall of the groove.

[0064] One end of the screw rod 103 is provided with a rotating handle 108, and shaking the rotating handle 108 drives the sliding block 104 to move away from or close to one end of the main shaft.

[0065] The two sliding blocks 104 slide in the two V-shaped grooves, and are combined with the first V-shaped limiting structure to fix and clamp the one end of the main shaft of the wind turbine at four points. Two lines of the four points pass through the axis of the main shaft, so that the fixing is more stable, which is a preferred embodiment.

[0066] In the specific embodiment, the linear power output unit is a rotary hydraulic cylinder 106 with a rotation angle of 90 degrees, and the rotary hydraulic cylinder 106 provides a pressing force for buckling the flange plate on one end of the main shaft. The fixed end of the rotary hydraulic cylinder 106 is connected with the groove through a connecting block 106, and the output end of the rotary hydraulic cylinder 106 rotates relative to the connecting block 106 in the circumferential direction, so that the position and angle of the buckle plate 105 can be buckled on the flange plate on one end of the main shaft.

[0067] Preferably, the connecting block 106 is connected with the sliding block 104, and the linkage of the two makes the adjustment process simple and fast.

[0068] In a preferred embodiment, the saddle clamp 5 is provided with two through holes 501, and the axes of the two through holes 501 are arranged in a V shape, and the intersection of the axes of the two through holes 501 is located in the annular structure enclosed by the saddle clamp and the second V-shaped limiting structure. Combined with the second V-shaped limiting structure, the certain section of the main shaft of the wind turbine is fixed and clamped at four points. Two lines of the four points pass through the axis of the main shaft, so that the fixing is more stable, which is a preferred embodiment.

[0069] In this embodiment, preferably, polyurethane plates 7 are arranged on each contact surface contacting the bearing seat or the main shaft or the flange plate to protect the bearing seat or the main shaft or the flange plate from being damaged.

[0070] In this embodiment, the mechanical limiting structure 902 of the horizontal state of the turnover table is arranged at a certain height behind the vertical plate 5 of the turnover table, and the mechanical limiting structure 901 of the vertical state of the turnover table is arranged on the base below the bottom plate 1 of the turnover table. In addition, an electrical limiting position is also provided, and the oil path of the hydraulic system is designed to meet the requirement of stopping at any time. At the same time, considering the negative pressure generated by bidirectional turnover during the turnover process, an oil supplementing circuit is designed, and an explosion-proof valve group is arranged in the hydraulic system circuit, and the thrust and pull force of the hydraulic cylinder are left with a margin.

[0071] The operation platform is arranged at the rear side of the turnover table, the height of the operation platform is 1.7 meters according to the safety regulations, so that the operator can conveniently work when the turnover table is turned to the horizontal state. Meanwhile, the operation platform is provided with inner guardrails and outer guardrails to ensure the safety of the operator. Further, the guardrail doors are arranged on the left and right sides of the inner guardrails, so that the workers can conveniently operate when the turnover table is turned to the horizontal state.

[0072] In the embodiment, the hydraulic station in the power device is arranged at the lower part of the operation platform, and a separate fence is arranged around the hydraulic station, mainly for isolating noise; the installation position of the hydraulic pump station is provided with a door into the pump house, so that the pump house can be entered for routine maintenance, and the hydraulic station is arranged considering the daily maintenance space; if the motor, pump and other parts need to be adjusted, maintained and replaced, the operation platform at the upper part of the hydraulic station is a detachable movable plate, which can be detached for maintenance of the hydraulic station when necessary.

[0073] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present technical solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present technical solution.

[0074] In the present technical solution, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specified. For those skilled in the art, the specific meaning of the above terms in the present technical solution can be understood according to the specific circumstances.

[0075] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the technical solution. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0076] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A flipper apparatus comprising a turntable for carrying a workpiece, a base supporting said turntable, and a power device for rotating said turntable, characterized in that, The turnover platform comprises: a bottom plate, a first V-shaped limiting structure and a sliding block, the sliding block is movably connected with the bottom plate and can be locked at a certain position on the bottom plate, the first V-shaped limiting structure and the locked sliding block radially fix the workpiece; a linear power output unit is arranged on the bottom plate, the output end of the linear power output unit is connected with a clamping plate, the fixed end of the linear power output unit is connected with the bottom plate, and the clamping plate axially fixes the workpiece; a vertical plate, which is connected with the bottom plate to form an L shape; a cantilever, which is fixed to the vertical plate, and a second V-shaped limiting structure is arranged at the free end of the cantilever; a saddle clamp, which is connected with the free end of the cantilever at both ends, and the saddle clamp and the second V-shaped limiting structure form an annular structure, a through hole is arranged on the saddle clamp, a ejector rod passes through the through hole, the ejector rod is movably connected with the through hole and can be locked with the through hole, and the second V-shaped limiting structure and the ejector rod radially position the workpiece; two grooves are arranged on the bottom plate, the two grooves are arranged in a V shape on the bottom plate, and the end with a smaller distance between the two grooves is closer to the vertical plate than the end with a larger distance; a lead screw is arranged at the bottom of the groove, a lead screw nut is arranged on the lead screw, the sliding block is connected with the lead screw nut, and the side wall of the sliding block is slidably connected with the side wall of the groove; the fixed end of the linear power output unit is slidably connected with the groove through a connecting block, and the output end of the linear power output unit can rotate around the connecting block.

2. The turnover apparatus according to claim 1, wherein The base is formed by connecting steel profiles, reinforcing bars are arranged on both sides of the steel profiles, and the base is fixed to the ground through expansion bolts.

3. The apparatus of claim 1, wherein: The base is connected with the turnover platform through heavy-duty bearings.

4. The apparatus of claim 1 wherein, The bottom plate and the vertical plate are formed by welding a steel plate on a rectangular profile.

5. The apparatus of claim 1 wherein, Further comprising: a support frame comprising a first section and a second section, the first section is connected with the vertical plate, and the second section is connected with the first section, and changing the connection length of the second section and the first section changes the length of the support frame.

6. Turnover apparatus according to any one of claims 1-5, characterized in that The connecting block is connected with the sliding block.

7. Turnover apparatus according to any one of claims 1-5, characterized in that Two through holes are arranged on the saddle clamp, the axes of the two through holes are arranged in a V shape, and the intersection of the axes of the two through holes is located in the annular structure formed by the saddle clamp and the second V-shaped limiting structure.

8. Turnover apparatus according to any one of claims 1-5, characterized in that Adjusting the connection length between the free end and the fixed end of the cantilever changes the length of the cantilever.

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